A ray of monochromatic light is reflected and refracted, as shown in the figure, in the point “A” at the interface between material 1 with refractive index n1 = 1.54 (chloride of sodium) and material 2 with refractive index n2 = 1.77 (sapphire). The incident lightning forms an angle of 55 ° to the interface. The light that penetrates material 2, at point “A”, arrives then to point “B” at the interface between material 2 and material 3, which is air (n3 = 1), the interface through "B" being parallel to the interface through "A". In "B" part of the light is reflected and the rest enters the air. What is the angle of refraction in air? a) 62.04 ° b) 55 ° c) 29.93 ° d) 35 °

A ray of monochromatic light is reflected and refracted, as shown in the figure, in the point “A” at the interface between material 1 with refractive index n1 = 1.54 (chloride of sodium) and material 2 with refractive index n2 = 1.77 (sapphire). The incident lightning forms an angle of 55 ° to the interface. The light that penetrates material 2, at point “A”, arrives then to point “B” at the interface between material 2 and material 3, which is air (n3 = 1), the interface through "B" being parallel to the interface through "A". In "B" part of the light is reflected and the rest enters the air. What is the angle of refraction in air? a) 62.04 ° b) 55 ° c) 29.93 ° d) 35 °